They are sometimes wider at the bottom than the top, so there is plenty of submerged buoyancy, but less unsubmerged to allow them to go through waves rather than pitching. Also helps to not meet all the wave face at the same time, which is what happens with conventional raked bows. Also a slight windage gain, but a length loss when the bow is buried. How big are the gains? Not very, particularly for cruising boats, imo. We may end up with one on the 15m as it makes the bows easier to shape using flat panels.
rob
that's a lot of moving parts.
what's the thinking behind the reverse rake on the non-plumb bows as seen here and on alinghi?
ben
--- In harryproa@yahoogroups.com.au, "captain_rapscallion" <captian_rapscallion@...> wrote:
>
> This was way to off the wall not to share... it was posted on the boat design forums. Watch the avi... you will be impressed.